9 
larger, with a fuller panicle and larger. spikelets. Named for 
A. H. Shepherd, Esq., of Batopilas, who extended great hospi- 
tality and assistance to Dr. Palmer, the collector. 
SPOROBOLUS ANNUUS. Culms 4 to 6 inches high, branched 
at the base; leaves 1 inch long or less, narrow; panicle 2 to 3 
inches long, about 1 inch wide, branches of the panicle mostly 
single and scattered, about 1 inch long, filiform, sparsely flow- 
ered ; spikelets about 1 line long, on scabrous pedicels twice to 
many times as long; empty glumes ovate, acuminate, sometimes 
awn-pointed, about one-fourth longer than the flower, smooth; 
flowering glume oblong, obtuse, hairy externally; palet about as 
long as its glume, hairy on the nerves. 
This small, annual grass is remarkable for its long, pointed, 
empty glumes, longer than the flowering ones. It has the habit 
of the preceding, but is easily distinguished. It is mixed in 
some of the sets with that species. 
SPOROBOLUS RACEMOSUS. Annual; culms 8 to 12 inches 
long, slender, decumbent and branching below, some of the 
branches floriferous and exserted, others included in the sheaths, 
lower joints short and numerous; leaves short, mostly about 1 
inch long, very narrow, sheaths short, striate, somewhat inflated, 
ligule short and truncate; panicle 2 to 3 inches long, meagre, 
open, branches few, hispidulous, mostly single and alternate, % 
inch to 1 inch long, simple or sparingly subdivided, few flowered ; 
spikelets racemose, about ¥% line long, short pedicelled, the pedi- 
cels glandular hispid, appressed, becoming reflexed; empty 
glumes purplish, about half as long as the spikelet, oblong, 
obtuse or erose, nerveless, nearly equal; flowering glume ovate, 
acutish, thicker than the outer glumes, smooth; palet similar in 
texture, nearly equaling its glume. 
Mixed in some of the sets with S. ramulosus and S. annuus. 
Both were collected near Noragachie in sandy or gravelly places 
near water. 
NOTE ON BOoUTELOUA. In the Agricultural Grounds we © 
have cultivated, the past season, two species of Bouteloua from 
seed collected by Dr. Palmer in Chihuahua, which have been 
distributed to some extent as Bouteloua Palmeri and B. major, 
Although these are of extraordinary size and luxuriance, and 
